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LARN 132 C33D4

Start the following in class:

1.a.  The required focus topic, J132A for today is

  1. List the steps of a procedure to grow a crystal of potassium aluminum sulfate dodecahydrate, KAl(SO4)2•12H2O(s), from a seed crystal of  potassium aluminum sulfate dodecahydrate, KAl(SO4)2•12H2O(s) and a saturated aqueous solution of the potassium aluminum sulfate.
  2. List the steps of a procedure to grow a crystal of potassium aluminum sulfate dodecahydrate, KAl(SO4)2•12H2O(s), from a seed crystal of  potassium aluminum sulfate dodecahydrate, KAl(SO4)2•12H2O(s) and a supersaturated  aqueous solution of the potassium aluminum sulfate.

1.b.  Write your second journal entry for today, J132B, on sheets of three holed 8.5 inch by 11 inch ruled paper.  In the upper right corner white space of each upward facing page, write your hand in number within a circle followed by your name. Each journal entry should either be at least a paragraph of exemplary writing and penmanship concerning a single topic, or be a concept map relating chemistry terms.  Begin each days paragraph with a topic sentence, follow with explained instances, and close with a focused summary statement.

Read pages R28 and R29 on the properties, and sources of the elements oxygen, sulfur, selenium, tellurium, and polonium found in Group 16 (VIA).  In your learning journal  record the answers to these three numbered questions:

  1. What is the most interesting fact you read about?  Please make your answer longer than one sentence.
  2. What makes this so interesting to you?  Please make your answer longer than one sentence.
  3. What is one use for one of the aforementioned nonmetals that you either were not familiar with or were least familiar with?  Please make your answer longer than one sentence.

1.c.  Write your third journal entry for today, J132C, on sheets of three holed 8.5 inch by 11 inch ruled paper.  In the upper right corner white space of each upward facing page, write your hand in number within a circle followed by your name.  Each journal entry should either be at least a paragraph of exemplary writing and penmanship concerning a single topic, or be a concept map relating chemistry terms.  Begin each days paragraph with a topic sentence, follow with explained instances, and close with a focused summary statement.

Read pages R30 and R31 on the properties, and sources of the elements oxygen, sulfur, and selenium found in Group 16 (VIA). In your learning journal  record the answers to these three numbered questions:

    1. What is the most interesting fact you read about?  Please make your answer longer than one sentence.
    2. What makes this so interesting to you?  Please make your answer longer than one sentence.
    3. What is one use for one of the aforementioned nonmetals that you either were not familiar with or were least familiar with?  Please make your answer longer than one sentence.

2.   Writing in blue or black ink, place your hand in number in a circle followed by your name in the upper right white space of a piece of three holed composition paper that hasn’t been written on.  Place the page reference for the problems to be considered to the left of the red marginal line on the first blue line.  Centered on the first blue line, write a descriptive title for the learning activity such as End-of-Chapter 16 [chapter #.section#] Responses.  Before you write your response to each question or problem listed below, write its designation to the left of the red marginal line as listed below, followed by your response in ink to the right of the marginal line.

  • Review the chapter 16 conceptual problems and then show your work including all conversion ratios for end-of-chapter problems E16-64a (End-of-chapter 16, problem 64a) and E16-64b on p. 499.

Recommended for those who have time left in their 45 minute study period, but not required of all:

1.  Review those concepts that we have discussed in class that are in your study guides, that are in your text study guide at the end of the chapter, and that on the chapter vocabulary sheet provided to you that describes what is a substance, an element, a compound, a coarse mixture, a colloidal suspension, a solution; an atom; a formula unit, a molecule;a phase, an aqueous phase; a chemical change, a physical change; a chemical reaction, a reactant, a product, a word equation, and a formula unit equation;and how are these concepts different?  You need to be able to explain the meaning of each of these terms, and be able to differentiate the terms, be able to compare and contrast these related terms, and give examples that make clear the points that you are trying to explain. Go over each of these concepts with your study partner.  Review the SI prefixes and their meanings until you can readily explain the meaning of each listed SI prefix as a numerical multiplier.

2.  Think about the fifteen properties of covalent molecular substances listed on the Properties to be understood worksheet describing differences in the properties of metals, ionic compounds, covalent network solids, and covalent  molecular compounds. Continue to study this handout for understanding and review how the typical properties of members of these classes of compounds depend on whether the compound has localized or delocalized electrons, and upon whether strong metallic, ionic, or covalent bonding or weak van der Waals forces of attraction are predominant between representative particles of the substances.  Try to understand how each property of a given covalent molecular substance is related to the groups of covalently bonded atoms that form molecules whose van der Waals attractive forces only weakly attract other molecules.

3. How do the properties of covalent molecular substances with hydrogen bonding typically differ from those covalent molecular substances that form molecules whose van der Waals attractive forces only weakly attract other molecules?